pwsh has no Get-WmiObject; it proxies the cmdlet through a Windows
PowerShell compat session, and the ManagementClass comes back
deserialized with its methods stripped, so Win32_ShadowCopy.Create
failed ("does not contain a method named 'Create'") and Delete would
have too. Invoke-CimMethod / Get-CimInstance / Remove-CimInstance are
native in both 5.1 and 7. Under CIM, Win32_ShadowStorage.Volume is a
CimInstance reference, so match on its DeviceID instead of the WMI
path string.
The smoke preferred powershell.exe over pwsh, so it never ran the kit
under pwsh; it now runs the kit under the host running the smoke.
10e62265f6